bash-4.2# pwd

/oracle/product/10.2.0/db_1/network/admin

bash-4.2# ls

sqlnet.ora                 libnrad10.exp     listener.ora      samples           tnsnames.ora

libnk510.imp      libnrad10.imp     listener.ora.bak  shrept.lst

bash-4.2# cp sqlnet.ora sqlnet.ora.bak

cp: sqlnet.ora: A file or directory in the path name does not exist.

bash-4.2#

bash-4.2#

bash-4.2# ls -ltr

total 40

-rw-r-----    1 oracle   dba             172 Dec 26 2003  shrept.lst

-rw-r-----    1 oracle   dba               0 Aug 14 2005  libnrad10.imp

-rw-r-----    1 oracle   dba               0 Aug 14 2005  libnrad10.exp

-rw-r-----    1 oracle   dba               0 Aug 14 2005  libnk510.imp

drwxr-x---    2 oracle   dba             256 Dec 13 2012  samples

-rw-r--r--    1 oracle   dba             505 Jun 12 09:04 listener.ora.bak

-rw-r--r--    1 oracle   dba             183 Jun 12 09:13 tnsnames.ora

-rw-r--r--    1 oracle   dba              39 Jun 12 09:18 sqlnet.ora

-rw-r--r--    1 oracle   dba             347 Jun 12 09:22 listener.ora

bash-4.2# ls sqlnet.ora

ls: 0653-341 The file sqlnet.ora does not exist.

bash-4.2#

bash-4.2# more sqlnet.ora

sqlnet.ora: A file or directory in the path name does not exist.